US5158625A - Process and apparatus for heat treating articles while hardening in gaseous medium - Google Patents

Process and apparatus for heat treating articles while hardening in gaseous medium Download PDF

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Publication number
US5158625A
US5158625A US07/680,423 US68042391A US5158625A US 5158625 A US5158625 A US 5158625A US 68042391 A US68042391 A US 68042391A US 5158625 A US5158625 A US 5158625A
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United States
Prior art keywords
helium
purifier
heat treating
hardening
gas
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Expired - Fee Related
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US07/680,423
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English (en)
Inventor
Benoit Lhote
Philippe Queille
Jean-Pierre Zumbrunn
Eric Duchateau
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LAir Liquide SA pour lEtude et lExploitation des Procedes Georges Claude
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LAir Liquide SA pour lEtude et lExploitation des Procedes Georges Claude
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    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/56—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering characterised by the quenching agents
    • C21D1/613—Gases; Liquefied or solidified normally gaseous material
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/74—Methods of treatment in inert gas, controlled atmosphere, vacuum or pulverulent material
    • C21D1/767—Methods of treatment in inert gas, controlled atmosphere, vacuum or pulverulent material with forced gas circulation; Reheating thereof
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/74—Methods of treatment in inert gas, controlled atmosphere, vacuum or pulverulent material
    • C21D1/773—Methods of treatment in inert gas, controlled atmosphere, vacuum or pulverulent material under reduced pressure or vacuum

Definitions

  • the present invention concerns the heat treatment of articles including hardening thereof in a gaseous medium.
  • the hardening gas is caused to recirculate in contact with said treated articles, the hardening gas being cooled by means of an external heat exchanger.
  • Hardening in gaseous medium constitutes an advantageous replacement solution over hardening in liquid medium, because it permits a better control of the kinetics of cooling, it minimizes deformations of the articles treated and takes away the cleaning operations required on the hardened articles, which are carried out in a salt bath or an oil bath.
  • furnaces operating under vacuum and adapted for gas hardening are provided with a powerful recirculating blower and the gas injected under pressure within the furnace is successively displaced through the load under the treatment. Cooling by convection therefore takes place while the gas thus warmed up is thereafter sent through a heat exchanger, for example of the water type, which cools the gas before the latter is sent back on the load of articles under treatment.
  • the cooling speed of the articles under an atmosphere depends among other factors of the pressure, the recirculation speed and the nature of the gas.
  • the gas speed depends on the recirculating blower.
  • the pressure is controlled by the quantity of gas injected into the furnace; it is limited by the characteristics of the furnace which define a maximum pressure allowable therein.
  • the gases currently used for hardening are nitrogen and argon.
  • gases having a better heat conductivity hydrogen or helium. This promotes heat exchange by convection between the article to be treated and the cooling flow.
  • An improved cooling speed enables to harden a wider range of materials under gas; for a given treatment, it is also possible to decrease the gas pressure in the furnace, thereby lowering the constraints to which the material is subject, or to increase the quantity of material that can be treated during a cycle.
  • the technical problem which is at the base of the present invention is the use of helium, or a mixture based on helium, for treatments with gas hardening while remaining economically competitive with known treatments under argon or nitrogen, and this object can be achieved in that at the end of a hardening operation, the load of helium is extracted out of the treatment enclosure, in final phase by pumping until obtaining a primary vacuum, said extracted helium is brought to purifying pressure by means of a compressor associated with a mechanical filter, and said helium is sent under purifying pressure into a purifier for removing impurities, after which it is transferred, possibly after recompression, in the buffer container.
  • helium is collected at purifying pressure in an intermediate container, after which it is sent into a permeation membrane separator producing purified helium under lower pressure, which is thereafter dried, then sent under pressure by the same compressor toward the buffer container of the furnace.
  • the extracted helium, recompressed at higher pressure at the holding pressure of the buffer container is mechanically filtered, caused to be transferred into a purifying device for the residual oxygen of the type with controlled addition of hydrogen for catalytic production of water vapor, after which the gas is possibly cooled and dried, then transferred to the said holding container.
  • the extracted helium, recompressed at a pressure higher than the holding pressure of the buffer container and mechanically filtered is caused to be transferred into a purifying device of the catalytic type for trapping residual oxygen and regenerating the catalyst by means of a flow of hydrogen, after which the gas is possibly cooled and dried and then transferred to said holding container.
  • the extracted helium, recompressed at a pressure higher than the holding pressure of the buffer container and mechanically filtered, is caused to be transferred into a device for purifying residual oxygen and possibly water vapor, of the molecular sieve type, enabling the adsorption of oxygen and possibly water vapor, whose regeneration is ensured by depressurization or by temperature increase, after which the gas is possibly cooled and dried, then transferred into said buffer container.
  • the extracted helium brought to a purifying pressure, is directly and substantially entirely sent into a purifier for removing impurities, possibly after being collected in an intermediate container. It is also possible, for example when the amount of impurities of extracted helium is low, to purify only a fraction of said extracted helium or to purify same only after it has been used for at least two consecutive hardening operations.
  • the invention also concerns an apparatus for the heat treatment of articles by hardening same in a gaseous medium including at least substantially helium, of the typo comprising a furnace with gas recirculating blower connected by means of ducts including a valve, on the one hand to a buffer container, and on the other hand to a primary vacuum pump bypassed by a duct including a valve and pressure reducer, which is characterized in that it comprises at the outlet of the pump, a small equalization container, a compressor, a mechanical filter, a helium purifier, and possibly, a dryer preferably with water vapor trapping by means of molecular sieve.
  • the apparatus may, possibly, also comprise a duct with valves bypassing the helium purifier.
  • the invention provides for the interposition of an intermediate container upstream of the purifier which is of the separator-with-membrane type whose purified gas outlet is connected to a dryer then through a valve upstream of said compressor whose outlet is also and directly connected by means of a valve to the buffer container.
  • the helium purifier is of the type with controlled addition of hydrogen for the catalytic production of water vapor.
  • the purification of helium can also be of the type with elimination by passage over and adsorption on a molecular sieve of oxygen and possibly of water vapor, the regeneration of said molecular sieves being carried out by depressurization or temperature decrease, possibly accompanied by passage of a flow of pure gas.
  • FIG. 1 is a schematic representation of an apparatus according to the invention.
  • FIG. 2 is a schematic representation of a variant.
  • a hardening furnace under vacuum 1 is normally connected on the one hand to a buffer container 2 by means of a duct 3 with valve 4, and on the other hand, to a vacuum pump 5, by means of a flushing duct 6 with valve 7.
  • Gaseous hardening is carried out at the end of the temperature rise of the articles in the furnace which is placed under vacuum by means of pump 5 (valve 7 opened), by sudden discharge of the buffer container 2 into furnace 1 by opening valve 4 (valves 7 and 27 closed).
  • a recirculating blower 8 ensures the homogenization of the atmosphere of the furnace.
  • the buffer container 2 is reloaded at maximum pressure via a loading duct 9.
  • the apparatus described above is provided with an equipment for the recovery of helium used towards the end of the hardening operation, which comprises, at the outlet of the flushing pump 5, a connecting duct 11 toward a holding container 12, which successively includes a valve 10 on the discharge of the pump 5, a three way valve 13, compressor 14, an oil removing filter 15, a three way valve 16.
  • the holding container 12 is connected by means of duct 17 including a valve 18 to the upstream high pressure compartment 19 of a permeator 20 with permeation membrane 21 for separating the latter from a downstream low pressure container 22.
  • the high pressure compartment 19 is connected to a duct 23 for withdrawing impurities, while purified helium reaching downstream low pressure compartment 22 is dried at 35 and must be kept under an intermediate pressure via compressor 14.
  • three way valve 16 is connected to buffer container 2 by means of duct 25.
  • Vacuum pump 5 is bypassed by means of a duct 26 including a valve 27 and pressure regulator 28.
  • polluted helium is first transferred from furnace 1 towards holding container 12 (valve 27 opened, valves and 10 closed, pump 5 stopped) three way valve 13, compressor 14, oil removing filter 15, three way valve 16 being opened towards holding container 12, where the partially purified helium gas is stored under pressure by means of compressor 14 in operation (valve 18 closed).
  • vacuum pump 5 is put into operation (valve 27 closed, valves 7 and 10 opened) with backflow towards compressor 14 which operates as previously indicated.
  • pump 5 is stopped (valves 7 and 10 closed) and the three way valves 13 and 16 are switched over to their second positions, where they respectively connect downstream compartment 22 of permeator 20 with the inlet of compressor 14 (through valve 13), and the outlet of the oil removing filter with buffer container 2 (through valve 16).
  • the gas purification of helium stored in the holding container 12 can then be carried out by opening valve 18, while the helium purified under low pressure, collected and sent through duct 24 is recompressed by compressor 14 to be stored in buffer container 2.
  • valve 18 is closed and the three way valves 13 and 16 are switched into their initial positions allowing free passage from furnace 1 towards holding container 12.
  • helium extracted from the furnace contains only a small amount of impurities
  • lightly polluted helium is transferred from furnace 1 through valve 16 which is opened towards buffer container 2, and this is carried out after passage of helium in pump 5, compressor 14 and oil removing filter 15 in the manner indicated above; the helium stored in buffer container 2 may then be reused for a new hardening operation.
  • valve 16 is switched so as to enable the apparatus to operate according to the embodiment described above, thereby enabling it to be purified.
  • the recycling equipment is mounted on a vacuum furnace of inner volume 10 m 3 in which treatments of articles of nickel base alloy are carried out. After a plateau at a temperature of 1300° C., a hardening with pure helium at a pressure of 2.5 bar absolute is carried out.
  • valve 27 is then opened and the gas is expanded at 28 in a circuit which bypasses the primary vacuum pump of the furnace; the gas is thereafter recompressed at 14, filtered and freed from oil at 15, and stored in a holding container 12 at a pressure higher than the buffer container 2 of the furnace.
  • valve 27 is closed, valves 7 and 10 are opened; the primary pump 5 is operated and sucks in the gas to send it back at the inlet of the compressor 14.
  • the furnace 1 is thereafter contacted with air, after which it is opened and ready for unloading and reloading.
  • Helium which is present in the holding container 12 has already been previously filtered and is freed from oil; it is thereafter purified in membrane separator 20, recompressed at 14 and sent back into the buffer container 2 of the furnace. It is sufficient to complete at 9 the quantity of helium lost during the recovery, before starting up another treatment cycle.
  • FIG. 2 With reference to FIG. 2, there is shown a unit consisting of furnace 1, buffer container 2, vacuum pump 5 bypassed by a pressure reducer 28, connected to an equalization container 29.
  • the latter is connected to compressor 14 followed by a mechanical filter 15 and from there, directly to a helium purifier 31.
  • the compressor 14 may possibly be bypassed by means of a duct 37 containing a pressure reducer 38, starting downstream of the compressor 14 and coming back towards the equalization container 29.
  • the helium purifier may be of any one of the following three types:
  • a cooler 34 may eventually be available.
  • at least two molecular sieves mounted in parallel are used, one being in operation and the other being regenerated by depressurization or temperature increase, eventually accompanied by passage of a flow of pure gas.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Separation Using Semi-Permeable Membranes (AREA)
  • Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Drying Of Gases (AREA)
  • Separation Of Gases By Adsorption (AREA)
US07/680,423 1990-04-04 1991-04-04 Process and apparatus for heat treating articles while hardening in gaseous medium Expired - Fee Related US5158625A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9004309A FR2660669B1 (fr) 1990-04-04 1990-04-04 Procede et installation de traitement thermique d'objets avec trempe en milieux gazeux.
FR9004309 1990-04-04

Publications (1)

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US5158625A true US5158625A (en) 1992-10-27

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US (1) US5158625A (de)
EP (1) EP0451050B1 (de)
JP (1) JPH06207214A (de)
CA (1) CA2039515A1 (de)
DE (1) DE69107651T2 (de)
ES (1) ES2069234T3 (de)
FR (1) FR2660669B1 (de)

Cited By (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2270327A (en) * 1992-08-06 1994-03-09 Linde Ag A process and appartatus for the continuous annealing of metallic material in the presence of hydrogen-rich protective gas
US5607572A (en) * 1993-08-26 1997-03-04 Ceramatec, Inc. Removal of oxygen from inert gases
US5676736A (en) * 1995-02-17 1997-10-14 L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude Process for introducing a filling gas into an enclosure and installation for employing same
US5704964A (en) * 1994-12-27 1998-01-06 Nippon Sanso Corporation Pressure swing adsorption process
US5938866A (en) * 1995-06-22 1999-08-17 Aga Aktiebolag Method and an apparatus for the treatment of components by a gas mixture
US6517791B1 (en) 2000-12-04 2003-02-11 Praxair Technology, Inc. System and process for gas recovery
EP1211003A3 (de) * 2000-12-04 2003-10-29 Praxair Technology, Inc. Verfahren zur Herstellung eines zerstäubten Metallpulvers mit Rückführung des Zerstäubungsgases
EP1211329A3 (de) * 2000-12-04 2004-01-02 Praxair Technology, Inc. Verfahren und Vorrichtung zum Hochdruckgasabschrecken in einem Schutzgasofen
WO2004042092A1 (de) * 2002-11-05 2004-05-21 Linde Aktiengesellschaft Verfahren und vorrichtung zur gaserückgewinnung
US20040237789A1 (en) * 2001-07-31 2004-12-02 Baksh Mohamed Safdar Allie Helium recovery
US20060037678A1 (en) * 2002-02-12 2006-02-23 Jean-Martial Leger Gas quenching installation and the corresponding quenching method
US20060189710A1 (en) * 2003-07-23 2006-08-24 Katsuhiro Hayashi Aqueous ink
WO2006119526A1 (de) * 2005-05-12 2006-11-16 Ebner Industrieofenbau Gesellschaft M.B.H. Verfahren zur chargenweisen wärmebehandlung von glühgut
US20060272752A1 (en) * 2003-08-21 2006-12-07 Florent Chaffotte Gas quenching method using a recycling facility
CN101893383A (zh) * 2010-07-23 2010-11-24 上海联川自动化科技有限公司 一种工业炉抽真空并充填惰性气体的方法及装置
WO2010144523A1 (en) 2009-06-10 2010-12-16 L'air Liquide Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude Method and system for membrane- bas ed gas recovery with adjustable amount of permeate recycled to the feed
CN101684515B (zh) * 2008-09-28 2014-07-23 傅家仁 大型压力容器原位逐段热处理方法
EP3006576A1 (de) * 2014-10-06 2016-04-13 Seco/Warwick S.A. Vorrichtung zum individuellen quench-härten von komponenten technischer ausrüstungen
CN112747253A (zh) * 2020-12-09 2021-05-04 格瑞拓动力股份有限公司 一种氦气压缩装置
EP4596725A3 (de) * 2024-02-02 2025-12-10 L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude Abschreckvorrichtung

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* Cited by examiner, † Cited by third party
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US5364828A (en) * 1992-10-21 1994-11-15 Minerals Technologies Spheroidal aggregate of platy synthetic hydrotalcite
RU2152443C1 (ru) * 1999-11-16 2000-07-10 Бунаков Олег Дмитриевич Способ термической обработки отливок из белого нелегированного чугуна
DE102004058464A1 (de) * 2004-12-03 2006-06-22 Linde Ag Verfahren zur Gasabschreckung
DE102005015450B3 (de) * 2005-04-04 2006-08-17 Ipsen International Gmbh Verfahren sowie Vorrichtung zur Gasabschreckung
JP5978816B2 (ja) * 2012-07-11 2016-08-24 新日鐵住金株式会社 熱処理後の不活性ガスの回収・再利用方法及び回収・再利用装置
CN110499409A (zh) * 2019-09-25 2019-11-26 上海颐柏科技股份有限公司 一种热处理淬火过程中二氧化碳循环利用装置及其方法
CN111850256A (zh) * 2020-08-04 2020-10-30 赣州市合安科技有限公司 一种下落冲洗清理的热处理淬火池
KR102846234B1 (ko) * 2022-12-29 2025-08-18 동우에이치에스티 주식회사 열처리용 냉각장치
KR102902672B1 (ko) * 2022-12-29 2025-12-22 동우에이치에스티 주식회사 열처리용 냉각장치

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US3713271A (en) * 1970-10-09 1973-01-30 Texaco Inc Process and apparatus for recovering a gas constituent by membrane separation
US4675030A (en) * 1983-10-11 1987-06-23 Costain Petrocarbon Limited Purification of helium
EP0266745A2 (de) * 1986-11-03 1988-05-11 Air Products And Chemicals, Inc. Verfahren zur Trennung der Komponenten eines Gasstroms
US4867808A (en) * 1987-10-28 1989-09-19 Degussa Aktiengesellschaft Heat treating a metallic workpiece by quenching under cooling gas under above atmospheric pressure and specified circulation rate
JPH03296820A (ja) * 1990-04-16 1991-12-27 Matsushita Electric Ind Co Ltd アセンブル処理方法及びアセンブル処理装置

Patent Citations (7)

* Cited by examiner, † Cited by third party
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US2450081A (en) * 1945-04-05 1948-09-28 George R Burkhardt Noble gas metallurgy
US3713271A (en) * 1970-10-09 1973-01-30 Texaco Inc Process and apparatus for recovering a gas constituent by membrane separation
US4675030A (en) * 1983-10-11 1987-06-23 Costain Petrocarbon Limited Purification of helium
EP0266745A2 (de) * 1986-11-03 1988-05-11 Air Products And Chemicals, Inc. Verfahren zur Trennung der Komponenten eines Gasstroms
US4867808A (en) * 1987-10-28 1989-09-19 Degussa Aktiengesellschaft Heat treating a metallic workpiece by quenching under cooling gas under above atmospheric pressure and specified circulation rate
US4867808B1 (de) * 1987-10-28 1994-02-22 Leybold Durferrit Gmbh
JPH03296820A (ja) * 1990-04-16 1991-12-27 Matsushita Electric Ind Co Ltd アセンブル処理方法及びアセンブル処理装置

Cited By (35)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2270327A (en) * 1992-08-06 1994-03-09 Linde Ag A process and appartatus for the continuous annealing of metallic material in the presence of hydrogen-rich protective gas
GB2270327B (en) * 1992-08-06 1995-06-14 Linde Ag A process and apparatus for the continuous annealing of metallic material in the presence of hydrogen-rich protective gas
US5607572A (en) * 1993-08-26 1997-03-04 Ceramatec, Inc. Removal of oxygen from inert gases
US5704964A (en) * 1994-12-27 1998-01-06 Nippon Sanso Corporation Pressure swing adsorption process
US5676736A (en) * 1995-02-17 1997-10-14 L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude Process for introducing a filling gas into an enclosure and installation for employing same
US5938866A (en) * 1995-06-22 1999-08-17 Aga Aktiebolag Method and an apparatus for the treatment of components by a gas mixture
EP1211003A3 (de) * 2000-12-04 2003-10-29 Praxair Technology, Inc. Verfahren zur Herstellung eines zerstäubten Metallpulvers mit Rückführung des Zerstäubungsgases
US20030129114A1 (en) * 2000-12-04 2003-07-10 Jaynes Scot Eric System and process for gas recovery
EP1211329A3 (de) * 2000-12-04 2004-01-02 Praxair Technology, Inc. Verfahren und Vorrichtung zum Hochdruckgasabschrecken in einem Schutzgasofen
US7067087B2 (en) 2000-12-04 2006-06-27 Praxair Technology, Inc. System and process for gas recovery
US6517791B1 (en) 2000-12-04 2003-02-11 Praxair Technology, Inc. System and process for gas recovery
US20040237789A1 (en) * 2001-07-31 2004-12-02 Baksh Mohamed Safdar Allie Helium recovery
US7294172B2 (en) 2001-07-31 2007-11-13 Praxair Technology, Inc. Helium recovery
US20060037678A1 (en) * 2002-02-12 2006-02-23 Jean-Martial Leger Gas quenching installation and the corresponding quenching method
WO2004042092A1 (de) * 2002-11-05 2004-05-21 Linde Aktiengesellschaft Verfahren und vorrichtung zur gaserückgewinnung
US20060165533A1 (en) * 2002-11-05 2006-07-27 Alexander Jurmann Method and device for recycling gas
US20060189710A1 (en) * 2003-07-23 2006-08-24 Katsuhiro Hayashi Aqueous ink
US7632453B2 (en) * 2003-08-21 2009-12-15 L'air Liquide-Societe Anonyme A Directoire Et Conseil De Surveillance Pour L'etude Et L'exploitation Des Procedes Georges Claude Gas quenching method using a recycling facility
US20060272752A1 (en) * 2003-08-21 2006-12-07 Florent Chaffotte Gas quenching method using a recycling facility
WO2006119526A1 (de) * 2005-05-12 2006-11-16 Ebner Industrieofenbau Gesellschaft M.B.H. Verfahren zur chargenweisen wärmebehandlung von glühgut
RU2398893C2 (ru) * 2005-05-12 2010-09-10 Эбнер Индустриофенбау Гезелльшафт М.Б.Х. Способ термообработки партий отжигаемого металла
US7875235B2 (en) * 2005-05-12 2011-01-25 Ebner Industrieofenbau Gesellschaft M.B.H. Method for batchwise heat treatment of goods to be annealed
US20090026666A1 (en) * 2005-05-12 2009-01-29 Peter Ebner Method for batchwise heat treatment of goods to be annealed
CN101684515B (zh) * 2008-09-28 2014-07-23 傅家仁 大型压力容器原位逐段热处理方法
US8444749B2 (en) 2009-06-10 2013-05-21 L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude Method and system for membrane-based gas recovery
WO2010144523A1 (en) 2009-06-10 2010-12-16 L'air Liquide Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude Method and system for membrane- bas ed gas recovery with adjustable amount of permeate recycled to the feed
US20100313750A1 (en) * 2009-06-10 2010-12-16 L'air Liquide Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude Method and System for Membrane-Based Gas Recovery
CN101893383B (zh) * 2010-07-23 2012-07-04 上海联川自动化科技有限公司 一种工业炉抽真空并充填惰性气体的方法及装置
CN101893383A (zh) * 2010-07-23 2010-11-24 上海联川自动化科技有限公司 一种工业炉抽真空并充填惰性气体的方法及装置
EP3006576A1 (de) * 2014-10-06 2016-04-13 Seco/Warwick S.A. Vorrichtung zum individuellen quench-härten von komponenten technischer ausrüstungen
US20160102377A1 (en) * 2014-10-06 2016-04-14 Seco/Warwick S.A. Device for individual quench hardening of technical equipment components
CN105648165A (zh) * 2014-10-06 2016-06-08 赛科/沃里克股份公司 用于技术设备部件的单独淬火硬化的装置
US10072315B2 (en) * 2014-10-06 2018-09-11 Seco/Warwick S.A. Device for individual quench hardening of technical equipment components
CN112747253A (zh) * 2020-12-09 2021-05-04 格瑞拓动力股份有限公司 一种氦气压缩装置
EP4596725A3 (de) * 2024-02-02 2025-12-10 L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude Abschreckvorrichtung

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JPH06207214A (ja) 1994-07-26
EP0451050A1 (de) 1991-10-09
CA2039515A1 (fr) 1991-10-05
FR2660669B1 (fr) 1992-06-19
DE69107651T2 (de) 1995-07-06
ES2069234T3 (es) 1995-05-01
EP0451050B1 (de) 1995-03-01
FR2660669A1 (fr) 1991-10-11
DE69107651D1 (de) 1995-04-06

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